height = 1.75
weight = 80.5
BIM = weight / (height * height)
if BIM < 18.5:
    print("过轻")
elif BIM <= 25:
    print("正常")
elif BIM <= 28:
    print("过重")
elif BIM <= 32:
    print("肥胖")
elif BIM > 32:
    print("严重肥胖")
